Final answer:
By dividing 8000 meters by 1000, we find that Donna swims 8 kilometers each week.
Step-by-step explanation:
To convert the distance that Donna swims each week from meters to kilometers, we use the conversion factor that 1 kilometer is equal to 1000 meters. Therefore, we divide the total distance swam in meters by 1000 to get the distance in kilometers.
We have: 8000 meters ÷ 1000 = 8 kilometers
So, Donna swims a total of 8 kilometers each week.